The ocean is not just a resource; it's our responsibility to protect and sustain it for future generations.
统计假设检验是一个古老的问题,但其现代处理始于内曼和皮尔逊的工作。
I don't believe in retirement. I believe in continuing to work as long as you're able.
游戏不仅仅是娱乐,它还是一种文化和艺术的表达。